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Grade 27 Titanium vs. 390.0 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 390.0 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is 390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
75
Elongation at Break, % 27
1.0
Fatigue Strength, MPa 170
76 to 110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
28
Tensile Strength: Ultimate (UTS), MPa 270
280 to 300
Tensile Strength: Yield (Proof), MPa 230
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 420
640
Maximum Temperature: Mechanical, °C 320
170
Melting Completion (Liquidus), °C 1660
650
Melting Onset (Solidus), °C 1610
560
Specific Heat Capacity, J/kg-K 540
880
Thermal Conductivity, W/m-K 21
130
Thermal Expansion, µm/m-K 8.7
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
24 to 25
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
79 to 83

Otherwise Unclassified Properties

Base Metal Price, % relative 37
11
Density, g/cm3 4.5
2.7
Embodied Carbon, kg CO2/kg material 33
7.3
Embodied Energy, MJ/kg 530
130
Embodied Water, L/kg 320
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
2.7 to 2.9
Resilience: Unit (Modulus of Resilience), kJ/m3 240
380 to 470
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
52
Strength to Weight: Axial, points 17
28 to 30
Strength to Weight: Bending, points 21
35 to 36
Thermal Diffusivity, mm2/s 8.8
56
Thermal Shock Resistance, points 21
14 to 15

Alloy Composition

Aluminum (Al), % 0
74.5 to 79.6
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
4.0 to 5.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 1.3
Magnesium (Mg), % 0
0.45 to 0.65
Manganese (Mn), % 0
0 to 0.1
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
16 to 18
Titanium (Ti), % 99 to 99.92
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.2